Benchmark: clonedeep vs structuredclone vs jsonstringify parse

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  "key1": "value1",
  "key2": 2,
  "key3": true,
  "key4": [1, 2, 3],
  "key5": { "nested": "object" },
  "key6": "value6",
  "key7": 7,
  "key8": false,
  "key9": [9, 8, 7],
  "key10": { "data": 10 },
  "key11": "value11",
  "key12": 12,
  "key13": true,
  "key14": [14],
  "key15": { "inner": 15 },
  "key16": "value16",
  "key17": 17,
  "key18": false,
  "key19": [1, 9],
  "key20": { "info": "twenty" },
  "key21": "value21",
  "key22": 22,
  "key23": true,
  "key24": [24],
  "key25": { "nested": 25 },
  "key26": "value26",
  "key27": 27,
  "key28": false,
  "key29": [2, 9],
  "key30": { "key": "thirty" },
  "key31": "value31",
  "key32": 32,
  "key33": true,
  "key34": [34],
  "key35": { "number": 35 },
  "key36": "value36",
  "key37": 37,
  "key38": false,
  "key39": [3, 9],
  "key40": { "k": 40 },
  "key41": "value41",
  "key42": 42,
  "key43": true,
  "key44": [44],
  "key45": { "v": 45 },
  "key46": "value46",
  "key47": 47,
  "key48": false,
  "key49": [4, 9],
  "key50": { "x": "fifty" },
  "key51": "value51",
  "key52": 52,
  "key53": true,
  "key54": [54],
  "key55": { "nested": "fifty-five" },
  "key56": "value56",
  "key57": 57,
  "key58": false,
  "key59": [5, 9],
  "key60": { "extra": 60 },
  "key61": "value61",
  "key62": 62,
  "key63": true,
  "key64": [64],
  "key65": { "deep": 65 },
  "key66": "value66",
  "key67": 67,
  "key68": false,
  "key69": [6, 9],
  "key70": { "hint": 70 },
  "key71": "value71",
  "key72": 72,
  "key73": true,
  "key74": [74],
  "key75": { "test": 75 },
  "key76": "value76",
  "key77": 77,
  "key78": false,
  "key79": [7, 9],
  "key80": { "desc": 80 },
  "key81": "value81",
  "key82": 82,
  "key83": true,
  "key84": [84],
  "key85": { "info": "eighty-five" },
  "key86": "value86",
  "key87": 87,
  "key88": false,
  "key89": [8, 9],
  "key90": { "data": 90 },
  "key91": "value91",
  "key92": 92,
  "key93": true,
  "key94": [94],
  "key95": { "final": 95 },
  "key96": "value96",
  "key97": 97,
  "key98": false,
  "key99": [9, 9],
  "key100": { "last": "hundert" }
};

var myCopy = null;

Tests:

lodash
myCopy = _.cloneDeep(MyObject);
structedClone (native)
myCopy = structuredClone(MyObject);
JSON.parse
myCopy = JSON.parse(JSON.stringify(MyObject));

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

JSON.parse

192K/s

structedClone (native)

85K/s

lodash

58K/s

Fastest: JSON.parse (3.3x faster)

View exact numbers

✓ JSON.parse: 191,590 ops/sec
• structedClone (native): 84,848 ops/sec
• lodash: 58,061 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
structedClone (native)
JSON.parse

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser/OS: Firefox 144 on Linux

View result in a separate tab

JSON.parse

104K/s

structedClone (native)

87K/s

lodash

44K/s

View exact numbers

Test name	Executions per second
✓ JSON.parse	103,529 Ops/sec
structedClone (native)	86,904 Ops/sec
lodash	43,594 Ops/sec

clonedeep vs structuredclone vs jsonstringify parse (version: 1)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: `lodash vs structedClone (native) vs JSON.parse`

Created: one year ago by: Guest

Go to the latest result

lodash

structedClone (native)

JSON.parse

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

clonedeep vs structuredclone vs jsonstringify parse (version: 1)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: lodash vs structedClone (native) vs JSON.parse

Created: one year ago by: Guest

Go to the latest result

lodash

structedClone (native)

JSON.parse

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `lodash vs structedClone (native) vs JSON.parse`